Improvement in burglar-alarms



` J. ISRAEL. -BURGLAR-ALARM.

No. 193,002. Patented :ru1y1'o,1e.77v.

PVITNESSES IJV'VEJV'TOR Jn Brezel,

By ab Attorney? l ff/gw., W@

NAPETRS, PMUTO-LITHOGRAPNER. WASHINGTON. o c.`

forth in my claims.

VUNITED STATEs PATENT OFFICE.

JOH-N ISRAEL, OFl LANCASTER, OHIO.

IMPROVEMENT IN BURGLAR-ALARMS. i

Specification forming part of Letters Patent No.A 193,002, dated July 10, 1877 g application led June 26, 1877.v

- same, reference being' had to the accompanying drawings.

The object of my invention is to improve and simplify the construction of the burglaralarm patented to Thomas N. Howell, April 2, 1872.V v

I employ a lamp and a tube and springrod and percussion for lighting the lamp, and a bell and striking apparatus for giving an alarm substantially and in general such as described in said patent but I have made some important modifications and'improvements, which constitute my invention, and which I will now describe in detail and set In the drawings, Figure l is a front elevation of my improved device. Fig. 2 is an end elevation ofthe same. Fig. 3 is a view, partly in elevation, and partly in lopgitudinal section, of the tube which carries the springrod and percussion detached and formed with a screw.

A indicates the bracket, having a concave arm for supporting the lamp-cylinder, and

which may be screwed to a window or doorframe, or to the ceiling of aroom. The lampeylinder or oil-vessel B is secured in the concavity of the bracket by a screw, and may be detached and reversed to accommodate different situations. Zi is the wick tube, provided with a collar, f, and screwed into the body of the cylinder. G is a standard for supporting the percussion-tube, which carries amatch-holder, c, and is secured to the top of the lamp-cylinder by screws. D is the percussion-cylinder, closed at one end, eX- cept an'escape-vent for the fulminate, and provided at the other end-with a screw-cap, d, like a common syringe. Through this screw-cap works the plunger-rod E surrounded by a coiled spring, E. On the outer end of the plunger-rod is a screw-knob, e, for withdrawing it to set it in position for exploding` the fulminate and setting of the alarm. .I form a hooknotch, n, on the plunger-rod, so

closed end of thepercussion-tube I form a slight concavity, as shown at a'. I cut aslot, S, in the tube, into which I insert the percussion-wafer. When the plunger strikes the wafer it drives or ineloses the percusssion in the concavity, and, pressing against the rim or margin ofthe concavity, confines it therein, and causes the dame or gases to escape more successfully through the vent, to light the match or lamp-wick, as the case may be.

It is sometimes'convenient to have the lamp and percussion-lighting device in separate parts to be attached tothe wall in juxtaposition; hence AI have provided a stump and screw to the cylinder, as shown in Fig. 3.

The operation of my-invention in connection withlan alarm mechanism, and in connection with a time mechanism, and in con-- neetion with doors and windows to be guarded, being substantially such as set forth in the patent of Howell, above referred to, and familiar tothe publie, I have not deemed itnecessary to describe or illustrate those things; but,

Having described my improvements, what I claim as my invention isl. The percussion-tube provided with the wafer-slot and concavity, substantially as described.

2. The combination of the percussion-tube, its screw-cap having annular notch n', and the spring-plunger having the hook-notch n, substantially as described.

3. The improved percussion device, having the wafer-slot, the concavity, the spring-plunger, the screw-cap, and provided with a screw or standard, substantially as described.

In testimony of which invention I hereunto set my hand.

JOHN ISRAEL.

Witnesses:

JOHN E. J oNEs, J. L. WARTMANN. 

